Straight-razor stropping machine



April 19, 1932. D. B. BROWN STRAIGHT RAZOR STROPPING MACHINE Filed July 25, 1.930 2 Sheets-Sheet l Fig.1 56 16 5 1 17 54a 7 35 us 18 M Q 0 3e 6 516 19 17 INVENTOR,

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April 19, 1932. 5 BROWN 1,854,577

STRAIGHT RAZOR STROPPING MACHINE 37 FigJO ATTORNEY.

Patented Apr. 19, 1932 UNITED sures DAVID :8. BROWN, or BELLINGHAM,WASII1NGTON STRAIGHT-RAZOR srnorrme MACHINE Application filed m '23,

My invention relates to improvements in straight razor stropping machines.

I was granted Patent Number 1,455,567

for safety razor blade sharpeners on May 15, 1923.

This invention has for an object to provide a machine to sharpen the old fashioned or straight razors, sometimes referred to as barbers razors.

Another object of improvement is to provide a razor holder suited for retaining the razor while in the machine which will allow the razor back and edge to simultaneously bear on the strop.

Another object of my improvement is to provide a razor sharpener adapted'to cause the razor edge to alternately bear on opposite sides thereof while being stropped.

Another object of my improvement is to 20 provide a razor sharpener adapted to cause both the razor and the strop to move resulting in a relatively drawing movement between the strop and the razor edge.

Another object of my improvement is to provide a razor sharpening machine suited for individual use to sharpen a razor While the patron is being prepared for shaving.

Other objects of my improvements will appear as the description proceeds.

I attain these and other objects of my improvement with the mechanism illustrated in the accompanying two sheets of drawings which form a part of this specification in which Figure 1 is a plan view of my razor sharpener, suited for individual use, in which neither razor holder nor razor is shown, Fig. 2 is a front side elevation of Fig. 1 with a razor holder and razor in place therein, Fig. 3 is a segregated bottom plan view of the pivoted holder carrier and axial oscillator, t is a segregated plan view of the s'tropping discs with a razor holder and a razor in place therein parts of the holder and razor being broken away.- Fig. 5 is a top plan view of the razor holder, Fig. 6 is a front side elevation of the razor holder, Fig. 7 is a segregated edge elevation of the razor blade holder, Fig. 8 is a front elevation of the holder bar, Fig. 9 is a segregated front 56 elevation of the holder carrier partly in sec- 1930. Serial No. 469,981.

tion on a medial vertical plane and Fig. 10 is a segregated top plan View of the cam and cam gear.

Similar characters refer to similar parts throughout. Certain parts are broken away to show other parts hidden thereby.

With more particular reference to the des ignated parts: Base 12 has a central opening to accommodate parts of the mechanism and is overlaid with base plate 18 fastened thereto. Bearing brackets 14 and 15. are fastened to the base plate and provide bearings for. shaft 16 mounted therein for revolution. Discs 17, 17 are fastened on shaft 16 spaced apart by sleeve 16 and have adjacent their opposite surfaces stro'pping discs 18, 18 mounted on shaft 16 and retained against discs 17 by flange washers 516-, 616. Discs 17 are fastenedon shaft 16 to revolve therewith and retained in place by fastening means, not shown, in disc hubs 016, 016'.

Sheave is fastened on the rear end of shaft 16. The shaft of electric motor 56 is parallel with shaft 16 and has drive sheave 57 fastened on the end thereof in belting relati'on" with sheave 55and over these two sheaves is placed belt 58 for a power driving connection. v v

Spur gear 23 is fastened on the front end of shaft 16 adjacent and to the rear of bracket 14 to revolve with the shaft. or

A cam-driven frame has bottom horizontal member 24 and vertical rectangular frame @524 providing rectangular opening 27 in which operatescam 21. Cam 21 is on the rear surface of and is integral with spur gear 19 which has gudg'eon 20 centrally located thereon and is mounted thereon in a bearing in bracket 14 for revolution disposed to engage with spur pinion 23 and is driven there-'- by. on cam 21 iscrank pin 22 extended rearward and best shown in Fig. 10. Frame member 24. has a dependent projection 2682b tended through opening a13 in the base plate to which isfastened plate 25 dispo'sedhori zontally beneathbase plate 13'adj acent thereto cooperating with member 24 in using the base plate as a guide for frame 24, (L24 to direct its horizontal reciprocations.

A carrier for the razor holder has recumbent bar 28 to the right hand end of which is joined hollow post 29. A pair of lugs 30 is fastened to the base plate beneath motor between which is mounted the left-hand end of bar 28 and to which it is pivoted by pin a31 extended through re istering holes in the lugs and hole 31 in the bar to dispose post 29 between plates 17, 17 at the left of shaft 16.

Standard 32 is fastened to bar and to its upper end is fastened horizontal arm 33 having horizontal slot 34 therein engaged with crank pin 22 on the cam. The construction providing for the horizontal reciprocation of frame 24-a24 by the revolution of cam 21 and the oscillation of post 29 by the revolution of crank pin 22 all of which is caused by the revolution of gear 23.

Hollow post 29 mounts hollow shaft 35 for oscillation. On the upper end of shaft 35 is head 36 having upwardly extending lug 37 and near the lower end of the shaft is fastened collar 38 which together with head 36 retains shaft 35 in post 29. On the lower end of shaft 35 is fastened arm 39 which on its outer end mounts a pair of spring arms 40, 40, which are pivoted to arm 39 by bolt 41 (5X- tended through registering holes in the spring arms and hole (39 in arm 39 and also through intervening washers 3239, 639 to 0&- set the springs from arm 39. The construc tion provides for the oscillation of spring arms 40, 40 with shaft 35 and the freedom of oscillation of the springs on bolt 41. Spring arms 40, 40 are disposed to have their ends extended through openings 0:25, a25 in plate 25. p The construction provides for the oscillation of shaft 35 by the reciprocation of plate 25. Since shaft 35 also oscillates vertically with post 29 and the ends of spring arms 40, being engaged in holes (125 which have no vertical movement, can not follow the vertical oscillations of bolt 41 their pivotal engagement with this bolt provides for the required vertical oscillations of the pivoted ends of the springs. V Razor holder block 42 has rod 43 fastened in its lower end and bolt 45 engaged in a tapped hole in its upper end. Bolt 45 has head (L45 thereon and rod 43 has terminal rod 44 pivoted to its'lower end. Rods 43 and 44 are adapted to be extended in hollow shaft 35 when the lower end of block 42 bears on the upper end of head 36 and lug 37 thereon engages with notch Z242 in the lower end of block 42 to cause said block to engage with head 36 for radial oscillation therewith.

Razor holder back bar 46 is bent at right angles at 47 and to the bent end is fastened spring 48 offset therefrom, adapted to retain the shank of a straight razor therebetween. A pair of springs 50, 50 fastened in head block 49 are suited to engaged the end of a razor blade therebetween. To head 49 is fastened threaded shank 51 which is engaged in a tapped hole in the lower end of bar 46.

Razor blade rest 52 has a threaded shank 53 to engage in a tapped hole in bar 46 above head 49 and serves to bear against the back of a razor blade when the end thereof is engaged between springs 50. 50. The threaded shanks of head 49 and rest 52 provide for adjustments to accommodate razor blades of difierent widths. Threaded shank 54 extends at right angles from the back of bar 46 to which it is fastened and is engageable in threaded hole 142 in block 42. It is preferred that the engagement between shank 54 and block 42 be easy so that the shank may easily oscillate in the block for reasons to be referred to. 42 and rod 43, 44 extended into hole (535 in hollow shaft 35 and block 42 bearing on shaft head 36 with the block engaged by lug 37 the razor holder is ready to receive a straight razor such as the one shown having blade A, v

shank B and handle 0. For conveniently placing the razor in the holder the latter is withdrawn and placed on motor 20 with block 42 at 42 bearing on bracket 54 fastened to the motor, as shown in dotted outline in Fig. 1, while the articulate rod end 44 of the holder rod remains in shaft 35 at 44. Then the several designated parts of the holder are in their positions indicated by the primes of their designating characters. The handle C is turned back and shank B thereof is inserted between the end of spring 48 and bar 47 while the end of blade A is introduced between springs 50, 50 and the back of the razor blade at the end thereof is caused to bear on rest 52 when the razor is in proper place in the holder for sharpening. Now the holder with the razor is set upright with the razor between leather discs 18. 18 and rod 43 extended into shaft 35 and block 42 hearing on and engaged with shaft head 36, while handle C bears on bolt head 45 and is supported thereby.

The motor is started causing all of the movable parts of the sharpener to operate. Discs 17 and leather discs 13 revolve in the direction indicated by the arrow in Fig. 1, razor blade A is caused to oscillate longitudinally in an arc about pin (131 while it oscillates transversely about the axis of shaft 35 to contact alternately with leather discs18, 18, where the blade including the edge thereof is caused to bear fiatwise against the leather which is moving from the back over the edge thereof.

In the segregated plan view in Fig. 4 the razor blade is shown in section on line 4-4 of Fig. 6 and the dotted lines indicate the movement thereof and location against the opposite leather disc 18. It is evidently desirable that the force causing the razor blade to bear on the leather should be flexible. This is attained by resilient arms 40, 40 attached to the lower end of shaft 35 which convey power from reciprocating plate 25 to shaft With shank 54 engaged in block razor 35. The drawingcharacterofthestropping stroke so desirable in sharpening a razor is provided by the longitudinal oscillation of post 29. In changing from disc to disc the blade should be free to bear fiatwise throughout its length against the discs. This is attained by the free turning shank 54 in block 42.

Adjustments are provided for by threaded shanks 51, 53 and 54 as well as by threaded bolt 45.

When sharpening of the razor is complete, current is turned 0E of the motor, allowing the machine to stop, and the holder is withdrawn to again lie on bracket 54 when the razor may be conveniently removed from the holder.

In the drawings dotted lines indicate the direction and extent of movement of operative parts.

Having thus disclosed my invention, what I claim as new therein and desire to secure by Letters Patent is,-

A razor sharpening machine including machine base, a shaft mounted horizontally in hearings on said base for revolution, a pair of abrasive discs fastened on said shaft spaced apart for revolution therewith, a pinion gear fastened on said shaft, a spur gear engaging said pinion mounted in bearings on said base for revolution, a cam fastened flatwise to the spur gear, a frame mounted on said base for reciprocation engaging the cam being reciprooated thereby, a recumbent bar having its outer end pivoted to said base for vertical oscillation and its inner end disposed between said discs, an upright hollow post being fastened to the inner end of said recumbent bar disposed between said discs, a crank pin on said cam, connections from said crank pin to said hollow post oscillating said post and recumbent bar, a hollow shaft being extended through said hollow post engaged thereby for movement therewith and for independent oscillation therein, a spring arm pivoted to said hollow shaft below said post being adapted to oscillate the hollow shaft and to oscillate on said pivot independently thereof, being engaged by said reciprocative frame to oscillate said hollow shaft, a straight-razor blade holder being mounted in the upper end of said hollow shaft to move therewith between said discs, and means to revolve said spur gear.

DAVID B. BROWN. 

